Are you thinking your dreams and his text are linked somehow? You're dreaming of him as he's on your mind when awake and that's creeping into your sub conscious when asleep.
The text is no biggie, he's asking for a ride. It's not totally out of the blue as you two obviously remain in contact. He wants a favour and thought of you.
If he has a new gf, what is there to think about ? I'm not sounding hard, but it sounds like you haven't moved on yet, and are day dreaming happy endings and opportunities to rekindle this relationshi. I don't know, people do get back together after a break up, but I wouldn't look for any great signs, to explain these happenings other than coincidence.

Anyway if you do give him this lift, (ride) you can 'test the water' see how the land lays. Who knows ? Maybe the request is an excuse to see you, and talk.
Either way, good luck.